DTC U0114: F-CAN Malfunction (PCM-SH-AWD Control Unit)

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
If DTC U0028 is stored at the same time as DTC U0114, troubleshoot DTC U0028 first, then recheck for DTC U0114.

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC U0114 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module, the SH-AWD control unit, and the PCM.
Check for DTCs in the DTCs MENU with the HDS.
Is SH-AWD system DTC 41 indicated?

YES - Go to step 5.

NO - Go to step 8.
Turn the ignition switch OFF.
Disconnect the SH-AWD control unit 20P connector.
Check for continuity between SH-AWD control unit 20P connector terminals No. 10 and No. 20*.

Fig 1: Identifying Continuity Between SH-AWD Control Unit 20P Connector Terminals 10 And 20
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ), then go to step 15 and recheck. If DTC U0114 is not indicated, replace the original SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ), then go to step 15.

NO - Repair open in the wire between the SH-AWD control unit (No. 10 (No. 20)*) and the PCM (A48 (A49)*), then go to step 15.

*: CANL line
Check for a poor connections at the SH-AWD control unit 20P connector and 8P connector.
Are the connections OK?

YES - Go to step 9.

NO - Repair the connections, then go to step 15.
Turn the ignition switch OFF.
Disconnect the SH-AWD control unit 20P connector.
Turn the ignition switch ON (II).
Measure voltage between SH-AWD control unit 20P connector terminal No. 7 and body ground.

Fig 2: Identifying Voltage Between SH-AWD Control Unit 20P Connector Terminal 7 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Go to step 13.

NO - Check the No. 20 SVTM-4, ARC, ODS (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 20 STVM-4, ARC, ODS (7.5 A) fuse and the SH-AWD control unit, then go to step 15.
Turn the ignition switch OFF.
Check for continuity between SH-AWD control unit 20P connector terminals No. 9 and body ground, and between SH-AWD control unit 8P connector terminal No. 2 and No. 3 and body ground individually.

Fig 3: Identifying Continuity Between SH-AWD Control Unit 8P Connector Terminal 2 And 3 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Identifying Continuity Between SH-AWD Control Unit 20P Connector Terminals 9 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ), then go to step 15 and recheck. If DTC U0114 is not indicated, replace the original SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ), then go to step 15.

NO - Repair open in the wire between the SH-AWD control unit and body ground (G603), then go to step 15.
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the PCM with the HDS.
Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC U0114 indicated?

YES - Check for poor connections or loose terminals at the gauge control module, the SH-AWD control unit, and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs indicated, go to the indicated DTCs troubleshooting.